Using WebClient DownloadString, how can I get a JSON API Result in plaintext?

Question

I would like to make the text plaintext rather than JSON formatting. How can I accomplish this? I've searched around but I haven't been able to come across a quick and easy solution that works. Having tried for a long time, I apologise in advance if this seems like a ridiculous question.

Here is my code:

private void textBox1_TextChanged(object sender, EventArgs e)
{
            
}
        
string pubIp = new System.Net.WebClient().DownloadString("https://vpnapi.io/api/?key=APIKEY");

private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
    textBox1.Text =  "IP Address: " + pubIp + System.Environment.NewLine;

It currently appears as this (but line by line):

{
    "ip": "1.1.1.1.1.1",
    "security": {
        "vpn": false,
        "proxy": false,
        "tor": false,
        "relay": false
    },
    "location": {
        "city": "Location",
        "region": "Location",
        "country": "Location",
        "continent": "Location",
        "region_code": "Location",
        "country_code": "Location",
        "continent_code": "Location",
        "latitude": "-00.0000",
        "longitude": "000.0000",
        "time_zone": "Location",
        "locale_code": "en",
        "metro_code": "",
        "is_in_european_union": false
    },
    "network": {
        "network": "1.111.1.1/11",
        "autonomous_system_number": "111111",
        "autonomous_system_organization": "ISP"
    }
}

I would like it to appear like this:

ip: 1.1.1.1.1.1 
security vpn: 
false proxy: 
false tor: 
false relay: false

location: city: 
Location region: 
Location country: 
Location continent: 
Location region_code: 
Location country_code: 
Location continent_code: 
Location latitude: -00.0000 
longitude: 000.0000 time_zone: 
Location locale_code: 
metro_code: 
is_in_european_union": false

network network: 1.111.1.1/11 
autonomous_system_number: 111111 
autonomous_system_organization: ISP